| Autor: |
Tong Li, Zi-Quan Feng, Bai-Hui Zhu, Ming-Li Li, Guo-Dong Li, Wen-Sheng Gao, Chun-Xiang You, Xiao‐Fei Wang |
| Rok vydání: |
2022 |
| DOI: |
10.21203/rs.3.rs-1520208/v1 |
| Popis: |
Plants mainly uptake inorganic nitrogen from soil as ammonium and nitrate. Less energy is required to assimilate ammonium compared to nitrates, and plants prefer to take up ammonium when the external nitrogen concentration is low. Investigating the patterns and mechanisms of ammonium absorption can help improve crop nitrogen utilization. In this study of apple, we isolated MdSAT1, a gene encoding an ammonium-responsive bHLH transcription factor. MdSAT1 promoted the growth and development of lateral roots and root hairs. Overexpression of MdSAT1 increased the transcript levels of genes related to ammonium uptake and assimilation and promoted the activities of ammonium assimilation-related enzymes, indicating that MdSAT1 can enhance ammonium uptake and utilization. MdSAT1 also can modulate ROS accumulation to ultimately regulate plant growth. Taken together, these findings provide insight into the mechanisms by which MdSAT1 controls ammoniun utilization as well as plant growth and development in apple. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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